Petroleum Geological Characteristics And Optimization Of Exploration Area In Fuxian Area Of Shaanxi Province

The study area is located in the southeast of Shanbei slope Erdos basin,the total area of about 1065 square kilometers area.In recent years,Yanchang Petroleum Group Company to increase exploration efforts,the Triassic Chang 6?Chang 8 reservoir has found in the study area and the surrounding areas,more than 100 oil wells were obtained industrial oil flow,shows the great potential of exploration and development.But because of the early weakness in basic research and other factors lead to progress in the Triassic deep exploration work is slow,especially the basic geological law of the western region by the early into the Fuxian restriction,geological understanding is not clear,the study of the basic geological rules urgently,distribution rules of the main reservoir clear layer,analysis of reservoir control factors,prediction of favorable oil enrichment area find advantageous resources,for the late development.Therefore,a thorough study of the Yanchang formation are the main oil-bearing formation Chang 6,Chang 8 layer sedimentary sand body source direction,rock and mineral characteristics,sedimentary facies,source reservoir cap combination machine accumulation model,selection of the favorable exploration target areas,to guide the exploration work next step,it is particularly important.Through the comprehensive application of modern sedimentlogy,the classical sequence stratigraphy,reservoir sedimentology,reservoir geology and geological statistics and so on the new theory,new method,using the sequence boundary identification and division and correlation of sequence stratigraphy,sedimentary microfacies analysis,analysis of pore structure analysis,reservoir characteristics,reservoir reservoir evaluation and prediction and geological statistics analysis on many aspects,rule of reservoir rock and mineral characteristics,pore types,physical distribution and its control factors in-depth analysis.On the basis of this,the reservoir model and elements of main chang 6,chang 8 reservoir is studied,screen and establish favorable exploration target area identification standard,finally a small layer of favorable reservoir distribution forecast target area,to provide a good scientific guidance for the next exploration.